body,html
  line-height:1;
  font-weight:200;
  font-family:'PingFang SC','STHeitiSC-Light','Helvetica-Light',Arial,
  sans-serif;
.clearfix
  display:inline-block;
  &:after
    display: block;
    content: '.'
    height:0;
    line-height:0;
    clear: both;
    visibility :hidden;
@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-aspect-ratio: 1.5)
  .border-1px
  &::after
    -webkit-transform: scaleY(0.7)
    -moz-transform: scaleY(0.7)
    -ms-transform: scaleY(0.7)
    -o-transform: scaleY(0.7)
    transform: scaleY(0.7)
@media (-webkit-min-device-pixel-ratio: 2),(min-device-aspect-ratio: 2)
  .border-1px
  &::after
    -webkit-transform: scaleY(0.9)
    -moz-transform: scaleY(0.9)
    -ms-transform: scaleY(0.9)
    -o-transform: scaleY(0.9)
    transform: scaleY(0.9)
